CVEvulnerability
CVE-2026-91143
6.9 MEDIUM
Official page ↗
- Status
- Deferred
- Published
- 2026-09-14
- Last modified
- 2026-09-23
- Assigner
- [email protected]
- CVSS 4.0 ([email protected])
- 6.9 MEDIUM — CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- CVSS 3.1 ([email protected])
- 7.2 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
- Weaknesses
- CWE-288
Description
goproxy through 15.3 fails to apply HTTP proxy basic authentication to CONNECT tunnel requests, allowing unauthenticated clients to bypass credential requirements. Attackers can issue CONNECT requests to establish tunnels through the authenticated proxy without providing credentials, enabling arbitrary TCP traffic relay and access to restricted destinations.
Related
Weakness · CWE (1)
- CWE-288 Authentication Bypass Using an Alternate Path or Channel weakness
References
- https://github.com/geo-chen/oss/blob/main/goproxy.md github.com
- https://github.com/snail007/goproxy github.com
- https://github.com/snail007/goproxy/blob/v15.3/services/http.go github.com
- https://github.com/snail007/goproxy/blob/v15.3/utils/structs.go github.com
- https://www.vulncheck.com/advisories/goproxy-through-15.3-authentication-bypass-via-connect www.vulncheck.com